It is definitely not normal considering the highest pay for a fresh grad is $3500 (if you get first class honours). Unless you get promoted every year, you only get about 3-4% increment yearly. So, 5.3k after 3.5 years is quite unlikely unless teaching isnít your first career.

First class honours + local pre-service masters (CS1 related), male. Starting pay in July 2016 was 4025 with no prior work experience. Currently GEO3, at 5.1k. So 5.3k is high but doesn't seem impossible.